Oct 1, 2020
diff --git a/06-Image-Thresholding/cv2_thresholding.py b/06-Image-Thresholding/cv2_thresholding.py
 import cv2
 import matplotlib.pyplot as plt
 import numpy as np


 # 灰度图读入
 img = cv2.imread('gradient.jpg', 0)
 # 自适应阈值对比固定阈值
 img = cv2.imread('sudoku.jpg', 0)

  print("Aligning images ... ")
  alignMTB = cv2.createAlignMTB()
  alignMTB.process(images, images)

  # Obtain Camera Response Function (CRF)
  print("Calculating Camera Response Function (CRF) ... ")
  calibrateDebevec = cv2.createCalibrateDebevec()
  responseDebevec = calibrateDebevec.process(images, times)

  # Merge images into an HDR linear image
  print("Merging images into one HDR image ... ")
  mergeDebevec = cv2.createMergeDebevec()
  hdrDebevec = mergeDebevec.process(images, times, responseDebevec)
  # Save HDR image.
  cv2.imwrite("hdrDebevec.hdr", hdrDebevec)
  print("saved hdrDebevec.hdr ")

  # # Tonemap using Drago's method to obtain 24-bit color image
  print("Tonemaping using Drago's method ... ")
  tonemapDrago = cv2.createTonemapDrago(1.0, 0.7)
  ldrDrago = tonemapDrago.process(hdrDebevec)
  ldrDrago = 3 * ldrDrago
  cv2.imwrite("ldr-Drago.jpg", ldrDrago * 255)
  print("saved ldr-Drago.jpg")


  # # Tonemap using Reinhard's method to obtain 24-bit color image
  print("Tonemaping using Reinhard's method ... ")
  tonemapReinhard = cv2.createTonemapReinhard(1.5, 0,0,0)
  ldrReinhard = tonemapReinhard.process(hdrDebevec)
  cv2.imwrite("ldr-Reinhard.jpg", ldrReinhard * 255)
  print("saved ldr-Reinhard.jpg")

  # # Tonemap using Mantiuk's method to obtain 24-bit color image
  print("Tonemaping using Mantiuk's method ... ")
  tonemapMantiuk = cv2.createTonemapMantiuk(2.2,0.85, 1.2)
  ldrMantiuk = tonemapMantiuk.process(hdrDebevec)
  ldrMantiuk = 3 * ldrMantiuk
  cv2.imwrite("ldr-Mantiuk.jpg", ldrMantiuk * 255)
  print("saved ldr-Mantiuk.jpg")





 # 固定阈值
 ret, th1 = cv2.threshold(img, 127, 255, cv2.THRESH_BINARY)
 # 自适应阈值
Original file line number	Diff line number	Diff line change
		@@ -1,5 +1,7 @@
		import cv2
		import matplotlib.pyplot as plt
		import numpy as np


		# 灰度图读入
		img = cv2.imread('gradient.jpg', 0)
Expand DownExpand Up		@@ -30,6 +32,51 @@
		# 自适应阈值对比固定阈值
		img = cv2.imread('sudoku.jpg', 0)

		print("Aligning images ... ")
		alignMTB = cv2.createAlignMTB()
		alignMTB.process(images, images)

		# Obtain Camera Response Function (CRF)
		print("Calculating Camera Response Function (CRF) ... ")
		calibrateDebevec = cv2.createCalibrateDebevec()
		responseDebevec = calibrateDebevec.process(images, times)

		# Merge images into an HDR linear image
		print("Merging images into one HDR image ... ")
		mergeDebevec = cv2.createMergeDebevec()
		hdrDebevec = mergeDebevec.process(images, times, responseDebevec)
		# Save HDR image.
		cv2.imwrite("hdrDebevec.hdr", hdrDebevec)
		print("saved hdrDebevec.hdr ")

		# # Tonemap using Drago's method to obtain 24-bit color image
		print("Tonemaping using Drago's method ... ")
		tonemapDrago = cv2.createTonemapDrago(1.0, 0.7)
		ldrDrago = tonemapDrago.process(hdrDebevec)
		ldrDrago = 3 * ldrDrago
		cv2.imwrite("ldr-Drago.jpg", ldrDrago * 255)
		print("saved ldr-Drago.jpg")


		# # Tonemap using Reinhard's method to obtain 24-bit color image
		print("Tonemaping using Reinhard's method ... ")
		tonemapReinhard = cv2.createTonemapReinhard(1.5, 0,0,0)
		ldrReinhard = tonemapReinhard.process(hdrDebevec)
		cv2.imwrite("ldr-Reinhard.jpg", ldrReinhard * 255)
		print("saved ldr-Reinhard.jpg")

		# # Tonemap using Mantiuk's method to obtain 24-bit color image
		print("Tonemaping using Mantiuk's method ... ")
		tonemapMantiuk = cv2.createTonemapMantiuk(2.2,0.85, 1.2)
		ldrMantiuk = tonemapMantiuk.process(hdrDebevec)
		ldrMantiuk = 3 * ldrMantiuk
		cv2.imwrite("ldr-Mantiuk.jpg", ldrMantiuk * 255)
		print("saved ldr-Mantiuk.jpg")





		# 固定阈值
		ret, th1 = cv2.threshold(img, 127, 255, cv2.THRESH_BINARY)
		# 自适应阈值
Expand Down